An Improved Model for Signalized Intersections

Delay is the critical index which is used for evaluating the signal timing plan of intersection. There are some classic models for calculating delay, such as HCM2000, Webster, ARRB and the synthesis algorithm used for urban comprehensive planning in Shanghai. The methods mentioned above are verified with the delay data surveyed in some intersections in Harbin. The result shows that there is a large difference between the mentioned models and the measured data. Thereby, five parameters model is established with the measured data by SPSS for calculating the delay of intersection which operates in different status. The test values satisfy the condition, which is required in the SPSS, and the correlation coefficients has attained above 98 percent. The built models have been used for evaluating the traffic situations of signal-controlled intersection in Harbin. The results can be accepted by the experts. Whether the built model can be used in other cities needs further research.